四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 6 = 100 × 6 - __ × 6 | 95 × 9 = (100 - __) × 9 |
| 44 × 9 = 9 × __ | 47 + 39 + 12 = (47 + __) + 12 |
| (6 + 13) × 9 = 54 + __ | 82 + 91 = 91 + __ |
| 98 × 7 = (100 - __) × 7 | 54 + 84 = 84 + __ |
| 51 × 9 = 9 × __ | (18 + 16) × 2 = 36 + __ |
| 95 × 4 = (100 - __) × 4 | 86 + 86 = 86 + __ |
| 98 × 5 = (100 - __) × 5 | (16 + 8) × 8 = 128 + __ |
| 51 × 5 = 5 × __ | 42 + 26 + 27 = (42 + __) + 27 |
| 89 × 4 = 4 × __ | 73 + 70 = 70 + __ |
| (18 + 5) × 2 = 36 + __ | 97 × 5 = 100 × 5 - __ × 5 |
| 55 + 87 = 87 + __ | (13 + 10) × 5 = 65 + __ |
| 49 + 44 = 44 + __ | 71 × 4 = 4 × __ |
| 97 + 90 = 90 + __ | 31 × 6 = 6 × __ |
| 20 + 33 + 36 = (20 + __) + 36 | (19 + 8) × 4 = 76 + __ |
| (19 + 18) × 5 = 95 + __ | 55 + 89 = 89 + __ |
| 31 + 44 + 3 = (31 + __) + 3 | 5 + 34 + 5 = (5 + __) + 5 |
| 95 × 7 = 100 × 7 - __ × 7 | 2 + 49 + 35 = (2 + __) + 35 |
| 73 + 67 = 67 + __ | 60 × 6 = 6 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 6 = 100 × 6 - __ × 6 2 | 95 × 9 = (100 - __) × 9 5 |
| 44 × 9 = 9 × __ 44 | 47 + 39 + 12 = (47 + __) + 12 39 |
| (6 + 13) × 9 = 54 + __ 117 | 82 + 91 = 91 + __ 82 |
| 98 × 7 = (100 - __) × 7 2 | 54 + 84 = 84 + __ 54 |
| 51 × 9 = 9 × __ 51 | (18 + 16) × 2 = 36 + __ 32 |
| 95 × 4 = (100 - __) × 4 5 | 86 + 86 = 86 + __ 86 |
| 98 × 5 = (100 - __) × 5 2 | (16 + 8) × 8 = 128 + __ 64 |
| 51 × 5 = 5 × __ 51 | 42 + 26 + 27 = (42 + __) + 27 26 |
| 89 × 4 = 4 × __ 89 | 73 + 70 = 70 + __ 73 |
| (18 + 5) × 2 = 36 + __ 10 | 97 × 5 = 100 × 5 - __ × 5 3 |
| 55 + 87 = 87 + __ 55 | (13 + 10) × 5 = 65 + __ 50 |
| 49 + 44 = 44 + __ 49 | 71 × 4 = 4 × __ 71 |
| 97 + 90 = 90 + __ 97 | 31 × 6 = 6 × __ 31 |
| 20 + 33 + 36 = (20 + __) + 36 33 | (19 + 8) × 4 = 76 + __ 32 |
| (19 + 18) × 5 = 95 + __ 90 | 55 + 89 = 89 + __ 55 |
| 31 + 44 + 3 = (31 + __) + 3 44 | 5 + 34 + 5 = (5 + __) + 5 34 |
| 95 × 7 = 100 × 7 - __ × 7 5 | 2 + 49 + 35 = (2 + __) + 35 49 |
| 73 + 67 = 67 + __ 73 | 60 × 6 = 6 × __ 60 |